Bloat is the number 1 killer of Great Danes. It is unfortunately common in deep-chested breeds. During Bloat the stomach distends and then has a tendency to twist which cuts off the blood supply to various parts of the body. This is an extremely painful condition and very quickly life threatening. If you suspect your dog may be bloating, if they are frothing at the mouth, attempting to vomit but can’t, rush them to the vet. If you reach in time, their life may be saved by surgery. Bloat can kill in a matter of a few hours, so this is not the time to wait and see how the dog is tomorrow morning.